Setting mechanism for twin band-saw mills.



G. E. CLEVELAND.

SETTING MECHANISM FOR TWIN BAND SAW MILLS.

APPLICATION FILED JULY 9, 190a.

Patented May 25, 1909.

3 SHEETS-SHEET 1 awuzvltozz THE NORRIS PETERS cc, wnsnmcmu. D c.

0-. B. CLEVELAND. SETTING MECHANISM POR'TWIN BAND SAW MILLS.

APPLICATION FILED JULY 9 1908. Patented May 25,

8 SBiHBTT-SHEBT 2.

THE mamas PETERS cc., wAsHmcrom n. :4

G. E. CLEVELAND. SETTING MEGHANISM FOR TWIN BAND SAW MILLS.

I 922,855. APPLICATION FILED JULY 9, 1908. Patented May 25,

3 SHEETS-SHEET 3.

Elvwemtoz CHARLES E. CLEVELAND, OF FOND DU LAG, WISCONSIN.

SETTING IKEGHANISMI FOR TWIN BAND-SAW] IVIILLS.

Specification of Letters Patent.

Patented May 25, 1909.

Application filed July 9, 1908. Serial No. 442,762.

To all whom it may concern:

Be it known that 1, CHARLES E. CLEVE- LAND, a citizen of the United States, residing at Fond du Lac, in the county of Fond du Lac and State of d-Fisconsin, have invented certain new and useful Improvements in Setting Mechanism for Twin Band-Saw Mills, of which the following is a specification.

My invention pertains to an improved setting mechanism for twin b and saw mills, the construction and advantages of which will be hereinafter set forth, reference being had to the annexed drawings, wherein:

Figure 1 is a side elevation of the mill, portions being broken away to more clearly illustrate the structure; Fig. 2 a vertical sectional view taken on the line 22 of Fig. 3; Fig. 3 a similar view taken on the line 33 of Fig. 2-; Fig. 4 a sectional view taken on the line 4-4 of Fig. 1, parts being slightly enlarged and the lever shown thrown forward or in a vertical position; Fig. 5 an enlarged sectional view of t 1e upper end of the quadrant setting lever and its allied parts; Fig. 6 a similar view of the quadrant and the pivotally attached radius bar and Fig. 7 a perspective view of the quadrant stand.

The object of the present invention is to provide a simple and eflicient mechanism for advancing twin band saw mills toward or receding them from each other, and one in which the parts of the actuating mechanism may be brought to a predetermined position and the saws thereafter advanced to correspond to the position of said setting mech anism.

A further object of the invention is to provide means whereby the parts will be relieved of shock, jar or breaking strains should a knot, piece of bark or the like become fouled with the machine, or more specifically, With the carriages upon which the saws are mounted.

V-Jith these and other objects in view, a detailed description of the invention will be given.

Referring to Fig. 1, the mills, which are designated by the reference numerals 5 and 6, are carried by suitable bases 7 and 8, which in turn are slidingly mounted in ways or brackets 9 secured to the mill framing 10.

Arranged in rear of one of the mills is a horizontally disposed shaft 11, to which is secured a rocker-arm 12, which arm in turn is secured to the outer end of the base 7 of the mill 5 by an adjustable rod 13. A rod 14 similarly connects the opposite end of the rocker-arm 12- with the inner end of base 8 of the mill 6.

Secured upon the outer end of the shaft 11 v is an arm or lever 15, the outer end of which carries a wrist-pin 16 which is embraced by a two-part box or bearing 17. Rods 18, encircled by springs 19, pass through openings formed in the outer portions of the box and through similar openings formed in the inner part of the boX, headed nuts on the rods hearing against the outer face of the inner portion of the box, as will be best seen upon reference to Fig. 2.

A rod 20 is connected at one end to the boX and at its opposite end to a pin 21 extending outwardly from a casting 22 secured to the lower end of the radius bar 23, the upper end of said bar being pivotally connected by a pin 24 to the set quadrant 25. A rod 26 is likewise connected to the pin 21 and extends downwardly, in the construction shown, to a vertically sliding head 27, which head is connected to thepiston-rod 28 oi a power cylinder 29.

The set quadrant is fulcrumed upon a pin 30, which is secured in an opening 31 in the set stand 32, shown in detail in Fig. 7, which stand is securely bolted to the framing of the mill. The quadrant is provided with a rib or flange 33 which enters a groove or channel 34 in the stand, said groove or channel and the rib 33 being formed concentrically with the pin upon which the quadrant is fut crumed.

To the upper end of the quadrant is socured a lever or handle 35 carrying a pair of pins 36 and 37, which pins may be thrown outwardly by a handle 38 which, as shown in r Fig. 5, is provided with an arm 39 that coacts with projecting members 40 and 41 carried by the outer ends of the pins. Said pins stand in line with a series of staggered openings 42 formed in the upper portion of the set stand.

The parts are so proportioned that the heads of the cylinder, on the stroke of the piston, form absolute stops for the mechanism.

Assuming, for the purpose of illustration, that the saws, as shown in the drawings, are five inches apart, if the pin 21 be moved upwardly so that its center coincides with the pin 30 (which may be termed the home stop) the saws may approach each other to within four inches. In this position the 'through the rods 13 and 14.

set quadrant 25 can be thrown forward, bringing the pin 24 to a higher point, increasing the angle between the radius bar 23 and the rod 20. If steam be admitted to the operating cylinder to depress the piston therein, the pin 21, when moved clownwardly to the full extent of travel of the piston, will be carried farther to the left, thus actuating the rod 20 to throw the lever 15 in the direction of the arrow, Fig. 1, and as a consequence actuating the shaft 11 and causing the mills to be moved farther apart The greater the throw that is imparted to the set quadrant the greater will be the movement of the pin 21 to the left, and as a result the saws will be moved a greater distance apart.

It is to be noted that when the pin 21 is moved up so that it coincides with the fulcrum or pin 30, the piston will strike the top head of the cylinder, or be at the limit of its travel in one direction, and when the pin 21 is moved downward to another position the piston will strike the bottom head, or be at the limit of its travel in that direction. Thus, as before stated, the heads of the cylinder, on the strokes of the piston, form absolute stops for the movement of the mechanlsm.

Any distance between the saws in frac tions of inches, say, from four inches up to twelve inches, is easily and positively determined by the movement of the set quadrant 25, the openings 42 being spaced for such thicknesses as it is desired the cants shall have. In the position shown, should it be desired to elevate the pin 21 and move the saws so that they will be, say, four inches apart, and a knot, bark or piece of slab should be between the bases, no damage would result from the upward movement of the rod 26 and the attached parts, for the reason that the springs would be compressed.

Having thus described my invention, what I claim is:

1. In combination with a pair of band saw mills mounted upon suitable Ways and movable toward and from each other; a rocker shaft; a rod connected to each of said mills and extending to the rocker shaft and being operatively connected therewith; and means for operating said rocker shaft in one or the other direction, whereby the band saw mills will be caused to approach or recede from each other.

2. In combination with a pair of band saw mills mounted u )on suitable ways and movable toward and from each other; a rocker shaft; connections between said shaft and each of said band mills; a power cylinder; and adjustable connections between said powercylinder and the rocker shaft, whereby the mills may be caused to advance toward or recede from each other. 7

3. In combination with a pair of band saw mills mounted upon suitable ways and adapt-= ed to move toward and from each other; a

rocker shaft; connections between said rocker shaft and the mills; a rod for actuating said. shaft; a power cylinder; connections between the piston-rod of said cylinder and the aforesaid rod; and means for shifting the position of said connections to vary the angularity between said parts, whereb the eX- tent of movement of the rocker s aft and consequently of the mills toward or from each other may be determined.

4. In combination with a pair of band saw mills mounted upon suitable ways and movable toward and from each other; a rocker shaft; connections between said shaft and each of said mills for moving the mills toward and from each other according to the direction of oscillation of said shaft; a rod con nected to the shaft to oscillate the'same; a power cylinder a rod connected to the piston of said cylinder and likewise to the rod aforesaid; a radius bar pivotally mounted at one end. and connected to the rods at their point of connection; and means for shifting the fulcrum of the radius bar, whereby the angularity between the bar and the first-named rod willbe varied and the throw of the rocker shaft in one or the other direction determined, and as a consequence the movement of the mills toward and from each other likewise determined.

5. In combination with a pair of band saw mills mounted upon suitable ways or guides and movable toward and from each other; an actuating rod; connections between said rod and the mills; a power cylinder; a rod connected to the piston-rod of said cylinder; a radius bar pivotally connected to said rods at their point of junction; and an adjustable quadrant upon which the radius bar is fulcrumed.

6. In combination with a pair of band saw mills mounted upon suitable ways and movable toward and from each other; an actuating rod; connections between said rod and the mills for moving the same toward or from each other as said rod is moved in one or the other direction; a power cylinder; a rod connected to the piston-rod of said power cylinder; a radius bar ivotally connected to the actuating rod an to the last-recited rod; a swinging set quadrant; a pivotal connection between said set quadrant and the radius bar; and means for holding the quadrant in its adjusted position.

7. In combination with a pair of band saw mills mounted upon suitable ways and movable toward and from each other; an actuating rod; connections between said rod and the mills for moving the same toward and from each other; a power cylinder; a rod connected to the piston-rod of said power cylinder; a radius bar; a pin forming a connection between said actuating red, the last-named mills; a second rod extending from the opporod and the radius bar; a set stand secured to l the framing of the structure; a set quadrant fulcrumed upon the set stand; a pivotal connection between said quadrant and the radius bar; and means for securing the quadrant in its adjusted position.

8. In combination with a pair of band saw mills mounted upon suitable ways and movable toward and from each other; a rocker shaft located to one side of the mills; a rocker arm secured to the shaft; a rod extending from one end of the arm to the outer end of one of the mills; a second rod extending from the opposite end of the rocker arm to the inner end of the second mill; a lever secured to the rocker shaft; a rod yieldingly connected to said lever; and means for actuating the rods to move the saws away from or toward each other, the yielding connection preventing undue strain from being placed upon the parts should any foreign material become lodged between the mills as they are moved toward each other.

9. In combination with a pair of band saw mills mounted upon suitable ways and movable toward and from each other; a rocker shaft; a rocker arm secured to the shaft and movable therewith; a rod extending from one end of said arm to the outer end of one of the site end of the rocker arm to the inner end of the other mill; a lever secured to the rocker shaft; a rod; a split bearing securing one end of said rod to the lever; springs serving to hold the bearing in its normal position; and means for applying power to the rod to move the shaft in one or the other direction and thereby advance or recede the mills toward or from each other.

and the mills to cause them to advance toward or recede from each other; a set stand;

a set quadrant fulcrumed upon said stand;

means for locking the quadrant to the stand in any desired position; a radius bar ful crumed upon the quadrant; a pivotal connection between the free end of the radius bar and the actuating rod; and means for swinging the radius bar and the rod upwardly or downwardly from their initial adjusted positions for a given distance, whereby the mills will be caused to move toward or from each other a distance equal to the adjustment effected by the set quadrant.

11. In combination with a pair of band saw mills mounted upon suitable ways and movable toward and from each other; an actuating rod; connections between said rod and the mills for moving the same; a set stand; a set quadrant fulcrumed upon said stand; a radius bar fulcrumed upon the quadrant; means for shifting said quadrant L and securing it in its adjusted position; a pivotal connection between the radius bar and the actuating rod; a power cylinder; and a rod connected to the piston-rod of said cylinder, said rod being also pivotally connected to the actuating rod.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CHARLES E. CLEVELAND.

Witnesses:

FRANK J WoLFF, II. G. DE SAMBRE. 

